X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [129.116.87.142] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.3.6) with ESMTP id 617940 for flyrotary@lancaironline.net; Thu, 28 Jul 2005 14:38:39 -0400 Received-SPF: none receiver=logan.com; client-ip=129.116.87.142; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C593A3.7743222A" Subject: RE: [FlyRotary] Re: fuel filter question Date: Thu, 28 Jul 2005 13:37:53 -0500 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E016C1C00@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: fuel filter question Thread-Index: AcWToj3zYm73G0JMSme4FpM2CPrdWwAAEW8g From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C593A3.7743222A Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable George,=20 As I recall, putting the filter between the tank and pump was true for the pre EFI cars, which were prone to vapor locking. But I can't think of any of the newer EFI cars that put the filter before the pump (excluding screen filters). Can you provide any examples? Mark S. =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Echo Lake Fishing Resort (Georges Boucher) Sent: Thursday, July 28, 2005 1:28 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: fuel filter question =20 Kevin I can't see a reason why you can't use them before the fuel pump, all the cars that we worked on (when I had my service business) that had external fuel pumps had the filter between the tank & the pump. Georges B. =20 -------Original Message------- =20 From: Bobby J. Hughes =20 Date: 07/28/05 10:40:22 To: Rotary motors in aircraft =20 Subject: [FlyRotary] Re: fuel filter question =20 Kevin, =20 I have know idea why EFI filters cannot be used on the low pressure side as long as they do not restrict flow. Hopefully someone will chime in with the facts. I am planning on using EFI filters before my pumps also. They are the same ones that Ed and others are running on the high pressure side. They have a large 16mm in and out. AC Delco GF652. I believe the Egg subi's are also running these filters on the low pressure side. =20 Bobby =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin lane Sent: Thursday, July 28, 2005 11:44 AM To: Rotary motors in aircraft Subject: [FlyRotary] fuel filter question I suspect that my engine problems stem from a design flaw, rather than a blockage. I normally never run my engine full power, full rich, but have been while breaking in the new rings. even leaning the engine a few notches prevents my problem, so it never arose in the past. my auto fuel filters are on the "suck" side, between the tanks and the selector valve. they are small, glass see-thru mesh filters. I realize now that all the fuel passes thru a pair of like 1/8" holes from a common 1/4" passage. I also see that the facet pump, despite pumping 15+ gals / hr with no head pressure, will only produce 1.75 lbs pressure when attached to the carb and bypassing the manual pump. my question - I was told not to use a fuel injection filter on a low pressure system like mine. I would like to keep the filters where they are rather than moving them to the engine compartment, since they filter stuff ahead of my flow meter and pumps. I like how they fit along the wing spar below my knees. I had problems with the replaceable filters shedding fibers into the carb, which is why I changed to the mesh filters. does anyone know what I should be using? I plan to do more testing this weekend if my wife will let me drive her car("no, I'm not feeling sleepy :-)" to get to the airport. Kevin Lane Portland, OR e-mail-> n3773@comcast.net =20 =20 =20 =20 =20 =20 ------_=_NextPart_001_01C593A3.7743222A Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

George, =

As I recall, putting the filter = between the tank and pump was true for the pre EFI cars, which were prone to = vapor locking.  But I can’t think of any of the newer EFI cars that = put the filter before the pump (excluding screen filters).  Can you = provide any examples?

Mark = S.

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Echo Lake Fishing = Resort (Georges Boucher)
Sent: Thursday, July 28, = 2005 1:28 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = fuel filter question

 

Kevin

 I can't see a reason why you can't use them before the fuel pump, all the cars = that we worked on (when I had my service business) that had external fuel = pumps had the filter between the tank & the = pump.

Georges = B.

 

-------Ori= ginal Message-------

 

Date: 07/28/05 = 10:40:22

Subject: = [FlyRotary] Re: fuel filter question

 

Kevin,

 

I have know idea why EFI filters cannot be used on the low pressure side as long as they do not restrict flow. Hopefully someone = will chime in with the facts. I am planning on using EFI filters before my = pumps also. They are the same ones that Ed and others are running on the = high pressure side. They have a large 16mm in and out. AC Delco GF652. I = believe the Egg subi's are also running these filters on the low pressure = side.

 

Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin lane
Sent: Thursday, July = 28, 2005 11:44 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = fuel filter question

I suspect that my engine problems stem from a design flaw, rather than a blockage.  I normally never run my engine full power, full rich, = but have been while breaking in the new rings.  even leaning the = engine a few notches prevents my problem, so it never arose in the past.  = my auto fuel filters are on the "suck" side, between the tanks and = the selector valve.  they are small, glass see-thru mesh = filters.  I realize now that all the fuel passes thru a pair of like 1/8" = holes from a common 1/4" passage.  I also see that the facet pump, = despite pumping 15+ gals / hr with no head pressure, will only produce 1.75 = lbs pressure when attached to the carb and bypassing the manual = pump.

    my question - I was told not to use a fuel injection filter on a low = pressure system like mine.  I would like to keep the filters where they = are rather than moving them to the engine compartment, since they filter = stuff ahead of my flow meter and pumps.  I like how they fit along the = wing spar below my knees.  I had problems with the replaceable filters shedding fibers into the carb, which is why I changed to the mesh filters.   does anyone know what I should be = using?

    I plan to do more testing this weekend if my wife will let me drive = her car("no, I'm not feeling sleepy :-)" to get to the = airport.

Kevin = Lane  Portland, OR
e-mail-> n3773@comcast.net=

 

 

 

 

 

 

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